Improvement in lamps



w. mnmm.

4 LAMP.

No. 193,015. Paten ted July 10,1877.

MPETERS, FHOTO-LITHOGRAPMER, WASHDNGTON. D C.

'N T D STATES AEINT O FIoE.

WILLIAM MGGARTHY, OFPHILADELPHIA,PENNSYLVANIA, ASSIGNOR or ONE-HALFInsfmcnrno. WILL A M, moon, on sAMn PLAoE.

IMPROVEMENT IN LAMPS.

Specification formingpart of Letters Patent No. 193,01 dated J 3' 1877;application filed April 24, 1877.

To all whom it may concern:

Be it known that 1, WILLIAM McOARTIIY, of Philadelphia, county ofPhiladelphia and State of Pennsylvania, have invented certain new anduseful Improvements in Safety- Lamps, of which the following is a full,clear, and exact description, reference being bad to the accompanyingdrawings, and to the letters of reference marked thereon.

Figure l is a partial section and elevation of a lamp-bowl having myimproved safetyvalve applied thereto. Fig.2 isa perspective view of thevalve as it appears when detached from the lamp-bowl.

Like letters in all the figures refer to corresponding parts.

The object of my invention is to improve upon the safety-valves used inconnection with kerosene or other fluid-burning lamps, rendering thesaid valve cheap and easy to be applied to those lamps already providedwith a filling-orifice at one side of the burnersupporting collar; andto accomplish this it (the invention) consists in certain details ofconstruction and combinations of parts, as will be hereinafter fullydescribed, and then pointed out in the claim.

A is the reservoir or bowl of a lamp, having a raised neck, B, similarto the filling-orifice provided in certain styles of lamps, and uponwhich a screw eap is ordinarily placed.

The valve should be sufficiently extensive in area to afford room forthe spout of the filling-can, and, more especially, to afford ample roomfor the escape of gases from within the lamps, so that the bowl may beimmediately relieved of as much pressure as will obviate the breakagecommonly following an explosionsay, three-fourths of a square inch. Itis desirable also that the valve be anchored so that it may not becomedetached, and in such manner that, in the event of an explosion, itshall completely uncover the mouth of the vent-tube B, and at the sametime be so confined as that it will not break the lamp-chimney bystriking against it.

The valve 0 is preferably made of cork, and should fit the neck Bsmoothly, and at the same time tightly enough to prevent its droppingout, or the splashing or slopping over of the oil as the lamp is beingcarried about. It is anchored within the bowl of the lamp by means of aflexible anchor, 9, attached to a chain, F, which is long enough topermit its removal when desired, but not so long as toadmit of itsstriking against the chimney when blown out. This chain permits of thevalve to be blown entirely away from over the gasvent in the event of anexplosion, thus affording a free and unobstructed passage for theescaping gases; and it also permits the valve to be turned upwardly togive room for the insertion of the spout of the filling-can.

The object of making the anchor flexible is that it may be readilyinserted into the fillingorifice, and thus obviate any alteration in theconstruction of the lamp-bowl. When made as shown, all that isnecessary, in order to attach thevalve to the bowl, is to bendthe anchorg slightly, pass it through the orifice B, and then straighten out theanchor by the finger inserted through the burner-supporting neck orwick-orifice.

Under the construction and arrangement shown it will be observed thatthe device is extremely simple and cheap; that :it may be applied to anyform of lamp havinga side orifice without necessitating any changetherein; and that it affords a very safe and reliable safety-valve,which operates at the same time as a cover for the filling-orifice.

The cork is covered by a metallic cap, D, to prevent its being forcedtoo far within the lamp, and to serve as a means of withdrawing thevalve, in order to fill the bowl.

I am aware of patent granted toF. Kampfe, October 7, 1873, wherein thegas-passage is covered by a valve held directly in the'line of theescaping gases in cases of an explosion.

This construction, moreover, involves a rim or band about the vent, andit has no cork to prevent slopping over of the oil. The vent shown inthe said patent is not practically available as a filling-orifice,inasmuch as the valve would have to be held in an elevated position bythe fingers during the process of filling.

I do not claim anything therein shown; but

Having thus fully described my invention, In testimony that I claim theforegoing I what I claim as new, and desire to secure by have'hereuntoset my hand in the presence of Letters Patent, istwo witnesses.

The herein-described safety attachment for lamps, consisting of thevalve 0 having a me- WILLIAM MCCARTHY. tallic top, the same beinganchored to the v I lamp bowl by means of a flexible anchor, g, at-Witnesses:

tached to a chain, F, and depending within CHAS. R. SEARLE,

said bowl, as and for the purposes set forth. GEO. F. GRAHAM.

